Home / 9,990.24-13,780.08-6,257.76

Finding the Fourth Proportional to 9,990.24, 13,780.08 and 6,257.76

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Solution

The fourth proportional to 9,990.24, 13,780.08 and 6,257.76 is: 8,631.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.24 : 13,780.08 = 6,257.76 : x
  2. Step 2: Convert to fraction form
    9,990.24/13,780.08 = 6,257.76/x
  3. Step 3: Cross multiply
    9,990.24x = 13,780.08 × 6,257.76
  4. Step 4: Simplify right side
    9,990.24x = 86,232,433.42
  5. Step 5: Solve for x
    x = 86,232,433.42/9,990.24
  6. Step 6: Final answer
    x = 8,631.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.